Steel alloy.



UNITED STATES PATENT OFFICE.

SAMUEL S. WALES, OF MUNHALL, PENNSYLVANIA, ASSIGNOR-TO CARNEGIE STEEL COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

STEEL ALLOY.

1, 1 1 1,710, Specification of Letters Patent.

. No Drawing.

Batented Sept. 22, 1914.

To all whom it may concern:

Be it lmown that I, SAMUEL S. WALES, of Munhall, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Steel Alloys, of which the following is a full, clear, and exact description.

My invention relates to alloys of steel and more particularly to steel alloys used in making armor plate.

The object of this invention is to provide a new steel alloy of novel composition in which metal of very great strength having a high resistance to shocks and impact is obtained.

In the manufacture of steel by my improved process the open hearth furnace is preferably employed and iron is converted into steel in the usual manner. In making the steel, small quantities of nickel,

chromium and titanium are added thereto,

in addition to the usual small amount of manganese and carbon present in such steels.

I have found that the following proportions are best for bringing the desired results: Carbon; manganese; nickel, up to 4.00 per cent; chromium, below 2.00 per cent.; titanium, below 2.00 per cent.

Application filed December 27, 1909. Serial No. 534,985.

The usual small quantities of sulfur, phosphorus and silicon will be present in the resulting alloy,.the amount of these materials being kept as low as possible.

Ferro compounds of the various alloying metals may be used in carrying out my invention.

The advantages of my invention result from the addition of the titanium to the nickel chrome steel, as by its use an alloy steel of greater purity and of very great strength having superior physical qualities is produced at a low cost and with a minimum amount of trouble.

I claim 1. An alloy steel containing manganese, 4 per cent. nickel, 2 per cent. chromium, and titanium.

2. An alloy steel containing manganese,

my hand.

- SAMUEL S. WALES. Witnesses:

R. D. LITTLE, JAS. L. WELDON. 

